Spark plug



Jan. 28, 1936. v

c. FALOR 2,028,971

SPARK PLUG Filed June 15, 1954 2 Sheets-Sheet l Jan. 28, I936.

C.FALOR r 2,028,971

SPARK PLUG Filed June 15, 1934 2 Sheets-Sheet 2 LIIM,

Patented Jan. 28, 1936 STATES PATENT OFFICE 1 Claim.

7 This invention relates to new and useful improvements in spark plugs for internal combustion engines.

The primary object of my invention is to provide a spark plug that permits the elimination of the ordinary ground point and at the same time will give more spark with less resistance and produce quicker starting action in a motor.

In one form of my invention, I provide the shell or sleeve which surrounds the porcelain electrode with a metal plug or ring which may be used as an insert in the base of the latter or suitably secured to the lower end of the base.

In another form of my invention, the plug or ring is provided with a plurality of spark points.

In still another form of my inventiomthe spark point which takes the place of the ordinary ground point is adjustable and in a still further form where a spark plug of the solid type is used, an opening is bored in the lower end of the metal base around the spark point of the porcelain shell.

With the foregoing and other objects in view that will appear as the nature of my invention is better understood, the same consists in the novel features of construction, combination and arrangement of parts illustrated in the accompanying drawings and more particularly pointed out in the appended claim.

In the accompanying drawings, which are for illustrative purposes only'and are therefore not drawn to scale:

Figure 1 is a side elevation, partly in section, of a spark plug provided with a metal plug or ring used as an insert.

Figure 2 is an end view.

Figure 3'is a sectional view of the lower end of a spark plug, showing another form of plug or ring.

Figure 4 is a side elevation, partly in section, of a spark plug of the solid type, showing how the lower end of the base is formed with an opening to receive the spark point of the porcelain shell.

Figure 5 is a sectional view of the lower end of the spark plug, showing how a copper collar may be used to center the lower end of the porcelain' electrode.

Figure 6 is a longitudinal sectional view, showing another form of opening in the lower end of the shell or sleeve which surrounds the porcelain electrode.

Figure 7 is a plan view of another form of insert.

Figure 8 is a vertical transverse section, taken on line 88 of Figure 7.

Figure 9 is a plan view of still another form of device, which may be welded or otherwise attached to the base of the metal shell or sleeve 5 of the spark plug.

Figure 10 is a vertical transverse section, taken on line lillll of Figure 9.

Figure 11 is a plan view of a metal plug or ring with a plurality of spark points used as an insert in the base of the shell.

Figure 12 is a vertical transverse section, taken on line l2-l2 of Figure 11.

Figure F3 is a view similar to Figure 12, showing how the metal plug or ring illustrated in Figure 11, may be secured by pins to the lower end .of the base of the shell.

Figure 14 is a plan view of a still further form of the device, which may be welded or otherwise secured to the base of the spark plug shell.

Figure 15 is a vertical transverse section, taken on line I'd-l5 of Figure 14.

Figure 16 is a plan view of another form of plug or ring, which is used as an insert in the lower end of the shell base.

Figure 17 is a vertical transverse section, taken on line I'll-I1 of Figure 16.

Figure 18 is a plan View of a plug or ring with an adjustable spark point and Figure 19 is a transverse section, taken on line l9--I9 of Figure 18.

Referring to the drawings for a more particular description of my invention and in which drawings like parts are designated by like reference characters throughout the several views, the numeral I designates the porcelain electrode, 2 the exteriorly threaded shell or sleeve surrounding the lower end of the electrode and 3 the spark point or pin carried by the lower end of the latter.

In the form of my invention illustrated in Figures 1 and 2 of the drawings, a metal plug or ring l is fitted in the lower end of the shell 2 of the spark plug and is formed in its top wall 5 with a central opening 6 to receive the spark pin 3. The 45 lower end of the spark pin 3 preferably extends somewhat below the larger central opening 7 formed by the body of the plug or ring and the bottom edge of said body may be formed with a flange 8, which fits against the lower edge of the shell 2.

In the modified form of my invention illustrated in Figure 3 of the drawings, the metal plug 4 is formed with a central upwardly tapering bore or opening a, whichrextends the full depth of the Figure 4 of the drawings illustrates a spark plug of the solidtypeformed with a central opening in in the bottom wall ll of the base 12 of the shell to, receive thespark' pin 3 of the porcelain electrode; 7

. In Figure of the drawings, the bottom wall I l V V of the base l2 of the shell, is provided with a central opening Ill to receive the; spark pin 3 and a coppercollan'lii is mounted in the hollowgbase and fits around the'lower end of the porcelain electrode I. The aforesaid collar serves to keep; carbon from accumulating on the lower end of' the electrode and alsohelps to center the elec trode. I I

In the form of my invention illustrated in Figure Got the drawings, the solid'baseof the spark" plug shell is formed with a central downwardly tapering opening 15, which receivesthe upperend oof 'thespark pin' 3, and. a cir'cularrecess I Bbelow and contiguous to the opening I5, which surrounds thelo wer end of the spark pin. V

,i Figures 7 and 8 show a metal insertcomprising a central circular hub I1 adapted to receive the spark pin 3. The hub H is formed with three c'orresponding radialarmsjll, whose outerends {fit'i'n corresponding recesses) in thelower edge 7 or the-shell ,2.

V The deviceshownin Figures .9 and 10 of the drawings, comp'rises'a central-collar 29 andtwo oppositely disposed transverse arms 2!, whose outer ends 22 are weldedor otherwise secured. to V vthe'lower end of theshell. r

' In the form of my invention illustrated in Figures lljand l2 ofthe drawings, the device is in the form of a cylindrical plug or ring 23, which fits in the lower end of the shell 2 and is formed at its inner edge with four inwardly extending radial tongues 24, whichsurround the spark pin 3 I and act as spark points.

: Figure 13 shows how a cylindrical plugor ring 23' having radial tongues 24 and of the general form illustrated in Figures and I2, may" be secured to the lower end of the shell by pins 22: V V I i I .7

7 In Figures 14 and 15 of the drawings, the'device comprises a central hub or collar 25, which surrounds the spark pin 3' and is provided with the outwardly extending radial arms 26, whose outer ends 21' are welded or, otherwise secured to the lower endiof the shell., I

In the form ofmy invention illustratedfin Fig-. l ures 16 and 17 of the drawings, the device comprises an outer cylindrical ring ZBQwhich fits in 'thelower end of theshell, and a central hub or collar '29 whichsurrounds the spark pin 3 and is connected to the outer ring by theinte rmediate radial arms 30.

Inthe form of my invention-illustrated in Figcures-l8 and 19 of the drawings, the device comprises a cylindrical ring 3 l which fits in the lower end of the shell 2 and whose inner edge is formed' withastraight wall or portion 32 and a triangui Ian-shaped spark point forming device 33 which is eccentrically pivoted, as1at34, to the 'bottom 'wall of the ring 3!. flt will be noted that the" element 33; may be turned on its pivotto cause 7 anyone of its spark points 35 to extend'across the straight wall or portion '32' of the ring.,3l,'oppo'-y site the spark pin 3 and thus regulate the length "ofthe spark gapflv V I I v From the foregoing description taken in con-:7 I

nection with thejdrawings, it is thought-that the construction, operation and advantages of my invention will be readily understood without re-- 7 quiring' a more extended explanation; V

. Having described my invention, what I claim as new and desire to secure by Letters Patent, is:.

In a spark plug of the character specified, a"

porcelain core provided; at'its lower end'with a around the lower'e'ndof "the electrode, a metal C INTO VFALOR. 

